Automatic burner for gas-stoves.



G. BRUTON. AUTOMATIC BURNER FOR GAS STOVES.

APPLIUATION FILED NOV. 4, 1907.

Patented Sept 29; 1914.

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17W). 8 Brawn 35 M11 (E GAM mrnga THE 5 PETERs (n PHOHJ LITHQ. WASHINGTON. w z" UNITED STATES PATENT OFFICE.

GEORGE BRUTON, or JOLIET, ILLINOIS, AssIeivon To FRANKLIN L. ROCKEY, 0

JOLIET, ILLINOIS.

AUTOMATIC BURNER FOR GAS-STOVES.

To all whom it may concern:

Be it known that I, GEORGE BRU'roN, a citizen of the United States, residing in Joliet, in the county of Will and State of Illinois, have invented a new and useful Improvement in Automatic Burners for Gas- Stoves, of which the following is a specification.

My invention relates to gas burners utilized for cooking purposes andhas for its primary object the utilizing of a burner containing a valve that will automatically control the supply of gas as the cooking vessel is placed over or removed from the burner; and it has for further objects such other improvements in construction or function as may be found to obtain in the devices hereinafter described or claimed.

in the accompanying drawings forming a part of this specification, Figure 1 is a sectional view of the complete device with the valve in normal closed position; Fig. 2 is a section on the line 2-2 of Fig. 1, but with the valve opened by the placing of a cooking vessel over the burner; and Fig. 3 is a section on the line 33 of Fig. 1.

Like reference numerals indicate like parts in all of the figures.

10 is an ordinary form of gas-stove burner laterally secured on the inlet pipe 11 which has the usual air-intake 12 located some distance to one side of the burner. The further extension 13 of the said intake pipe is looped back upon itself and connects with the vertical pipe section lt below the center of the burner. The flow of gas into the outer extremity of the last named pipe section is controlled by the usual stop cook 15. intermediate the ends of the said verticat pipe section 14 there is inserted the valve box 16 whose transverse partition 17 is provided with the central aperture 18 in which the valve 19 is normally seated. The said valve is provided with the valve stem 20, centered in the transverse webs, 21, 21 of the valve box, and projecting vertically upward through the bushing 22 in the top of the vertical pipe section 14:. Flanges 23, 2 1, near the upwardly projecting top of said valve stem, form a recess in which is engaged the forked end 25 of the counterweighted lever 26 that is pivoted on the supporting piece 27. The said counterweighted lever is readily detached by merely drawing the pin on which it is pivoted, and when it automatic jet.

Specification of Letters Patent. Patented S t 29 1Q14 Application filed November 4, 1907.

Serial No. 400,514.

tion so as to seat the valve and prevent any flow of gas, through the aperture 18, to supply the burner. .Such a counterweight is substantially more practical than any form of spring device, inasmuch as all of the partsin immediate proximity to the burner are subjected to such high temperatures that any form of spring, used for either seating or unseating the valve, will soon be weak ened or destroyed by superheating. It is also important that the counterweight should act to seat the valve and close the burner, in order that the valve may only be opened by the direct weight of the cooking vessel, and also to the end that the valve maynormally drop open when the counterweight is removed for the purpose of converting the burner into an ordinary non- The open center of the burner is provided with a web 32 adapted to centrally support the plunger 33 whose lower end is socketed, at 34, to fit over the extreme top of the valve stem. The top of the said plunger is provided with the head 35 whose upper surface normally stands just above the level of the stove-top 30. It

is obvious that if a flat bottomed cooking vessel is placed upon the stove top over the burner, the bottom of said vessel will strike the head of the plunger and depress it, thereby depressing the valve stem, unseating the valve, and permitting the free flow of gas to the burner. A small. accessory pipe 86, whose lower end is inserted between the valve and the stop cock, and which is therefore constantly fed while the stop cock is open, provides a pilot flame, at 37, for the ignition of the gasissuing from the burner when the valve is automatically opened. If the valve were so formed that when seated it still permitted some slight flow of gas to the burner, the pilot flame might be unnecessary because the lifting of the cooking vessel, and consequent upward movement of the valve stem, would not reduce the fiow of gas to a sufficient extent to entirely put out the burner-flame.

It is of importance that the valve should be located directly underneath the burner, in order that the valve controlling connections may be as short as possible and act in the most direct possible manner,-both for the sake of simplicity of construction and in order to insure durability and permanence of adjustment. Yet it is also of importance that the air intake, which of course-must be in the gas intake intermediate the valve and burner, should be removed to some distance in front orto one side of the burner, in order that the air drawn intothe gas intake may be fresh cool air from outside of the stove instead of the vitiated heated air that is in the immediate proximity of the burner and that may rise from lower burners,such as oven-heating jets-on the same stove. The device of this invention makes it possible to locate the automatically controlled valve immediately under the burner and yet avoid all necessity for drawing vitiated heated air, which would prevent proper combustion, into the gas intake intermediate the valve and burner. It is obvious that wherever the burner may be located in the stove, and however remote it may be from an adjacent side of the stove, the loop of the gas intake intermediate the valve and the burner may be readily lengthened to any extent, without in any manner modifying the valve controlling devices, and the air intake thus brought to any desired point at the outside of the stove top, where a supply of non-vitiated air will be insured.

Where the bottom of the cooking vessel is somewhat concave, the central part of said bottom may not touch or sufficiently depress the plunger head, and to meet this contingency there is provided an accessory controlling lever 38 pivoted to the stud 39 that is let into a hole or socket in the stove plate 30. The free lower end of this controlling lever is forked to engage the top of thevalve stem and normally rest on the upper flange 2% that projects from the upper part of said valve stem. The upper horizontal member of this controlling lever stands normally a little above the level of the stove-top, and when any cookingvessel is placed over the stove hole it is obvious that at least the outer rim of said vessel will rest upon and depress said controlling lever, thereby depressing the valve stem and opening the valve in the same manner as if the central plunger were depressed. Fig. 2 shows the valve stem de pressed by the action of the controlling lever when a concave bottomed cooking vessel has been placed over the burner.

My invention is hereinabove set forth as embodied in one particular form of construe tion, but I do not limit it thereto, or to less than all of the possible forms in which the said invention as hereinafter claimed may be embodied and distinguished from prior devices for like purposes.

I claim 1- 1. In a gas-stove burner, in combination; a burner having a valve centrally located thereunder and automatically controlled by the placing and removing of the cooking vessel, said valve being provided with an upwardly projecting valve-stem and plunger extending centrally through the burner and adapted to make contact with the bottom of said cooking vessel, and also being provided with a lateral controlling lever adapted to make contact with the outer rim of the bottom of the cooking vessel; and a gasconduit leading from said valve laterally outward from nude and looped back to said burner and provided near its outer looped end with an air intake and mixing chamber laterally removed from under said burner, substantially as specified.

2. In a gas-stove burner, in combination; a burner having a valve located centrally thereunder and automatically controlled by the placing and removing of the cooking vessel, said valve being provided with an upwardly projecting valve-sten'i; and means for imparting motion to said valve-stem, said means being formed and arranged to be depressed by contact of either the central bottom or the rim of the cooking vessel supported in its operative position over the burner; and a gas-conduit leading from said valve laterally outward from under and looped back to said burner and provided near its outer looped end with an air intake and mixing chamber laterally removed from Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

